I upgraded to Windows 10 on July 30 and since then I have experienced problems on two occasions where the RAM reaches 99% usage which then slows the system down and results in an inability to shut down correctly. Shut down appears to happen but I believe it goes into sleep mode despite choosing 'Shut Down'. There is no output to the monitor but the hard drive continues (blue light showing). Even when the computer comes out of sleep it still shows 99% RAM usage. The only way to sort this out is to hold the power button in until full shut down occurs.
Although the RAM is showing at 99%, the actual usage is nowhere near that figure. The first time the problem occurred, I was playing GTA V and thought that this was the cause however the second time it happened I was using Internet Explorer with very little else running.
I have 16Gb of RAM so it is a bit worrying that all of this can be used especially with very little running.
After searching the web, I found that users of Windows 7 and 8.1 have experienced similar problems in the past and in most cases this appears to be a memory management leak problem related to the 'ndu' (Windows Network Data Usage Monitor). Amending the registry solved the problem by changing a setting (Start value) to 4 which disabled some part of the ndu.
Sorry if this does not make much sense.
I was wondering if anyone else has experienced this problem following the upgrade and if so whether changing the ndu setting would work. I have not tried chaging the setting in case it creates more problems as I do not fully undersatnd the significance of the above solution and more importantly why the problem occurs in the first place. I never experienced this problem when running Windows 8.1.
It might be a case of going back to 8.1.